Enable Library Evolution Mode for Source

[mnaruse]

This PR enables library evolution mode for the Source target in Package.swift . By adding the -enable-library-evolution flag to swiftSettings, we ensure module stability and binary compatibility , allowing for smoother updates and better support for prebuilt frameworks.

Changes:

• Added -enable-library-evolution to swiftSettings in Package.swift .

Why?

• Module stability: Ensures that clients depending on this module do not need to recompile when updates are made.

• Binary compatibility: Allows distributing precompiled binaries while maintaining forward compatibility.

• Fixes a warning: When using Cuckoo in an app, the following warning appears. This change resolves that issue.:

  Module ‘Cuckoo’ was not compiled with library evolution support; using it means binary compatibility for ‘XXX’ can’t be guaranteed

Verification

• Applied this commit on a branch created from the 2.0.10 tag.
• Ran $ swift build -c release and confirmed that the release build succeeds without errors.

Logs

$ swift build -c release

warning: 'cuckoo': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /Users/m_naruse/workspace/git/home/Cuckoo/Tests/Info.plist
warning: 'cuckoo': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /Users/m_naruse/workspace/git/home/Cuckoo/Source/Info.plist
Building for production...
/Users/m_naruse/workspace/git/home/Cuckoo/Generator/Sources/Internal/GeneratorHelper.swift:79:75: warning: immutable value 'closure' was never used; consider replacing with '_' or removing it
 77 |         var fullString = ""
 78 |         for (index, parameter) in method.signature.parameters.enumerated() {
 79 |             if !parameter.type.containsAttribute(named: "@escaping"), let closure = parameter.type.findClosure() {
    |                                                                           `- warning: immutable value 'closure' was never used; consider replacing with '_' or removing it
 80 |                 if fullString.isEmpty {
 81 |                     fullString = "\n"

/Users/m_naruse/workspace/git/home/Cuckoo/Generator/Sources/Internal/Tokens/Capabilities/HasGenerics.swift:30:40: warning: expression implicitly coerced from 'String?' to 'Any'
28 |             "genericParameters": genericParametersString,
29 |             "genericArguments": genericArgumentsString,
30 |             "genericProtocolIdentity": genericProtocolIdentity,
   |                                        |- warning: expression implicitly coerced from 'String?' to 'Any'
   |                                        |- note: provide a default value to avoid this warning
   |                                        |- note: force-unwrap the value to avoid this warning
   |                                        `- note: explicitly cast to 'Any' with 'as Any' to silence this warning
31 |         ]
32 |         .compactMapValues { $0 }
[10/10] Compiling CuckooGenerator CuckooGeneratorError.swift
Build complete! (10.50s)

Additional Note:

• The current master branch (at commit bc6bc58 , which includes “Update Tuist”) fails to build in release mode, but that issue is unrelated to this commit.

[MatyasKriz]

Does this limit us in any way going forward? I wonder if enabling this has any drawbacks, why isn't it enabled by default?

[MatyasKriz]

@mnaruse can you please enlighten me?